CN110715792B - Display panel, test method and tool thereof and display device - Google Patents

Display panel, test method and tool thereof and display device Download PDF

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Publication number
CN110715792B
CN110715792B CN201911043777.5A CN201911043777A CN110715792B CN 110715792 B CN110715792 B CN 110715792B CN 201911043777 A CN201911043777 A CN 201911043777A CN 110715792 B CN110715792 B CN 110715792B
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fingerprint
test
signal output
current value
output port
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CN110715792A (en
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关琳燕
王伟鹏
黄建才
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

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  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention provides a display panel, a test method, a fixture and a display device thereof. The display panel comprises a photosensitive unit array, M fingerprint scanning lines extending along a first direction and N fingerprint data lines extending along a second direction; the fingerprint scanning circuit also comprises a fingerprint scanning drive circuit and a fingerprint test circuit; the fingerprint scanning line is electrically connected with the fingerprint scanning driving circuit; the fingerprint test circuit comprises a fingerprint test signal output port, a fingerprint test control port, a fingerprint scanning control port group and a plurality of fingerprint test switch units, a fingerprint data line is electrically connected with the fingerprint test signal output port through the fingerprint test switch unit, the control end of the fingerprint test switch unit is electrically connected with the fingerprint test control port, and a fingerprint scanning drive circuit is electrically connected with the fingerprint scanning control port group. The invention can detect the fingerprint identification function of the display panel before the binding process of the flexible circuit board, and avoids the problem of waste caused by the inflow of abnormal products of the fingerprint identification function into the subsequent working section.

Description

Display panel, test method and tool thereof and display device
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel, a test method, a fixture and a display device thereof.
[ background of the invention ]
With the continuous development of scientific technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present. The main component of the electronic device that implements the display function is the display panel. In order to ensure the safety of information stored and used in the electronic equipment, the electronic equipment needs to be provided with an identity recognition system. Fingerprint identification is the mainstream method for fingerprint identification of electronic devices at present due to its advantages of high safety and convenient use.
At present, a certain yield rate problem still exists when a display panel with a fingerprint identification function is manufactured, namely, the manufactured display panel still has a certain probability that the fingerprint identification function is abnormal. If the abnormal product can be detected before the flexible circuit board binding process is not carried out, the waste caused by the fact that the abnormal product flows into a subsequent working section can be avoided.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel, a test method, a fixture, and a display device thereof, which can implement detection of a fingerprint identification function before a flexible circuit board binding process, and avoid a problem of waste caused by abnormal products flowing into a subsequent process.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel includes a display area and a non-display area; the display area comprises a photosensitive unit array, a plurality of photosensitive units are arranged in the photosensitive unit array in an array mode, the photosensitive unit array comprises a plurality of photosensitive unit rows extending along a first direction and a plurality of photosensitive unit columns extending along a second direction, and the first direction is crossed with the second direction;
the display area further includes: the fingerprint scanning line structure comprises M fingerprint scanning lines extending along a first direction, a photosensitive unit row and a fingerprint scanning line are electrically connected, N fingerprint data lines extending along a second direction, and a photosensitive unit column and a fingerprint data line are electrically connected, wherein N, M is a positive integer;
the non-display area includes: a fingerprint scanning drive circuit and a fingerprint test circuit; the fingerprint scanning line is electrically connected with the fingerprint scanning driving circuit;
the fingerprint test circuit comprises at least one fingerprint test signal output port, a fingerprint test control port, a fingerprint scanning control port group and a plurality of fingerprint test switch units, wherein a fingerprint data line is electrically connected with the fingerprint test signal output port through the fingerprint test switch unit, one fingerprint data line corresponds to one fingerprint test switch unit, one fingerprint test signal output port corresponds to at least one fingerprint data line, the control end of the fingerprint test switch unit is electrically connected with the fingerprint test control port, and the fingerprint scanning drive circuit is electrically connected with the fingerprint scanning control port group.
Based on the same inventive concept, in a second aspect, an embodiment of the present invention provides a test method, including:
controlling the photosensitive unit to be opened, and testing the current value of the output port of the fingerprint test signal to obtain a test current value;
and judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value.
Based on the same inventive concept, in a third aspect, an embodiment of the present invention provides a fixture, including: the device comprises a panel bearing table, a surface light source, a test card, a current statistical module, a plurality of ports and a test control module; wherein the content of the first and second substances,
the panel bearing table is used for placing a display panel to be tested;
the testing card is used for simulating the reflection effect of fingers on light, wherein during testing, the display panel to be tested is positioned between the surface light source and the testing card, and the display surface of the display panel to be tested deviates from the surface light source and is opposite to the testing surface of the testing card;
the system comprises a plurality of ports, a display panel and a control module, wherein the ports are used for being electrically connected with the display panel to be tested and comprise a fingerprint test signal receiving port, a fingerprint test control signal output port and a fingerprint scanning control signal output port group;
the test control module is electrically connected with the fingerprint test control signal output port and the fingerprint scanning control signal output port respectively and is used for controlling the opening of a photosensitive unit row in the display panel to be tested;
and the current counting module is electrically connected with the fingerprint test signal receiving port and is used for receiving the current value received by the fingerprint test signal receiving port to obtain a test current value.
Based on the same inventive concept, in a fourth aspect, an embodiment of the present invention further provides a display device, including the display panel provided in any embodiment of the present invention.
The display panel, the test method thereof, the jig and the display device provided by the embodiment of the invention have the following beneficial effects:
the fingerprint test circuit is arranged in the display panel, and line-by-line detection of the photosensitive unit lines can be realized through mutual matching of the fingerprint test circuit and the fingerprint scanning drive circuit. When a certain photosensitive unit row is detected, the current value at the fingerprint test output port is detected to obtain a test value, the photosensitive performance of the photosensitive element in the photosensitive unit row is evaluated through the test current value, when the photosensitive performance is abnormal, the fingerprint function of the display panel is judged to be abnormal, and the detected display panel is discarded as an abnormal product and does not need to flow into a subsequent working section. Therefore, the fingerprint identification function of the display panel can be detected before the flexible circuit board binding process, and the problem that the abnormal fingerprint identification product flows into a subsequent working section to cause waste is avoided.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an alternative implementation of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another alternative implementation of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart of a testing method provided by an embodiment of the present invention;
FIG. 7 is a flowchart of an alternative embodiment of a testing method according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a state of the display panel during testing by the testing method provided in FIG. 7;
FIG. 9 is a flow chart of another alternative embodiment of a testing method provided by an embodiment of the present invention;
FIG. 10 is a first diagram illustrating a state of the display panel during testing by the testing method shown in FIG. 9;
FIG. 11 is a second schematic diagram illustrating a state of the display panel during testing by the testing method shown in FIG. 9;
FIG. 12 is a schematic diagram of a test surface of a test card used in the test method according to the embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view taken at line F-F' of FIG. 12;
fig. 14 is a schematic view of a jig according to an embodiment of the invention;
fig. 15 is a schematic view of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The embodiment of the invention provides a display panel, a test method, a fixture and a display device thereof. By arranging the fingerprint test circuit in the display panel, the test current value can be obtained by detecting the current value output by the fingerprint test signal output port in two different states, the light sensitivity performance of the light sensitive unit is evaluated by adopting the test current value, and the detection of the fingerprint identification function of the display panel is realized. The detection process of the fingerprint identification function can be realized before the binding process of the flexible circuit board, and the problem that the abnormal products of the fingerprint identification function flow into the subsequent working sections to cause waste can be avoided.
Fig. 1 is a schematic diagram of an alternative implementation of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel includes a display area AA and a non-display area BA; the display area AA includes a photosensitive cell array in which a plurality of photosensitive cells Y are arranged in an array, the photosensitive cell array includes a plurality of photosensitive cell rows YH extending along a first direction x and a plurality of photosensitive cell columns YL extending along a second direction Y, and the first direction x intersects with the second direction Y; fig. 1 illustrates only an array of 3 × 4 photosensitive cells as an example. Alternatively, the light sensing unit array is only located in a partial area within the display area AA to implement a partial fingerprint identification function. Or the photosensitive unit arrays can also be arranged in the whole display area to realize that the whole surface of the display panel has the fingerprint identification function.
The display area AA further includes: the fingerprint scanning line comprises M fingerprint scanning lines ZS extending along a first direction, a photosensitive unit row is electrically connected with one fingerprint scanning line ZS, N fingerprint data lines ZD extending along a second direction, and a photosensitive unit column is electrically connected with one fingerprint data line ZD, wherein N, M are positive integers; the number of the fingerprint scanning lines ZS and the number of the fingerprint data lines ZD are both related to the arrangement of the photosensitive cell arrays, and only an array with 3 × 4 photosensitive cell arrays is taken as an example in fig. 1, and 3 fingerprint scanning lines ZS and 4 fingerprint data lines ZD are disposed in the corresponding display area AA.
The non-display area BA includes: a fingerprint scanning driving circuit ZL1 and a fingerprint testing circuit ZL 2; the fingerprint scanning line ZS is electrically connected with a fingerprint scanning driving circuit ZL 1; in the fingerprint identification stage, the fingerprint scanning driving circuit ZL1 is used for driving the fingerprint scanning lines ZS to scan line by line. In one embodiment, the fingerprint scanning driving circuit ZL1 includes a plurality of cascaded shift registers, one fingerprint scanning line ZS is electrically connected to one shift register, and the fingerprint scanning lines ZS are scanned line by line through the cascaded shift registers. In another embodiment, the fingerprint scanning driving circuit ZL1 includes a plurality of circuit leads, one fingerprint scanning line ZS is electrically connected to one circuit lead, and in the fingerprint identification stage, the driving chip directly inputs driving signals to the circuit leads in sequence, so as to scan the fingerprint scanning lines ZS line by line.
The fingerprint test circuit ZL2 includes at least one fingerprint test signal output port DK1 (only one fingerprint test signal output port is indicated in fig. 1), one fingerprint test control port DK2, one fingerprint scan control port group DKZ and a plurality of fingerprint test switch units ZK, wherein, the fingerprint data line ZD is electrically connected with the fingerprint test signal output port DK1 through the fingerprint test switch unit ZK, one fingerprint data line ZD corresponds to one fingerprint test switch unit ZK, one fingerprint test signal output DK1 corresponds to at least one fingerprint data line ZD (only the condition that all fingerprint data lines ZD are electrically connected with the same fingerprint test signal output DK1 is indicated in the figure), the control end of the fingerprint test switch unit ZK is electrically connected with the fingerprint test control port DK2, and the fingerprint scan drive circuit ZL1 is electrically connected with the fingerprint scan control port group DKZ. The fingerprint scanning control port group DKZ comprises a plurality of ports. In an embodiment where the fingerprint scanning driving circuit ZL1 includes a plurality of cascaded shift registers, the fingerprint scanning control port group DKZ includes at least a port for inputting a start signal to the fingerprint scanning driving circuit ZL1, a port for inputting a control signal to the fingerprint scanning driving circuit ZL1, a port for inputting a clock signal to the fingerprint scanning driving circuit ZL1, and the like. In an embodiment where the fingerprint scanning driving circuit ZL1 includes a plurality of circuit leads, the fingerprint scanning control port set DKZ includes ports electrically connected to the circuit leads.
The display panel provided by the embodiment of the invention can be used for testing and setting the fingerprint identification function. In the stage of testing the fingerprint identification function: the fingerprint test signal output port DK1 is used for receiving a fingerprint test signal and outputting the received signal outwards; the fingerprint test control port DK2 is used for controlling the opening or closing of the fingerprint test switch unit ZK, when the fingerprint test switch unit ZK is opened, a signal on a fingerprint data line ZD electrically connected with the fingerprint test control port DK2 can be transmitted to a fingerprint test signal output port DK1, because a fingerprint test signal output port DK1 corresponds to at least one fingerprint data line ZD, a fingerprint data line ZD is arranged to correspond to one fingerprint test switch unit ZK, and when the fingerprint test switch unit ZK is in a closed state, the fingerprint data lines ZD are mutually insulated, so that a fingerprint detection stage after the display panel is applied can be ensured, and each fingerprint data line ZD can independently return a sensing signal to the driving chip; the fingerprint scanning control port group DKZ is used for driving the fingerprint scanning lines ZS to scan line by line. The following describes a method for testing the fingerprint recognition function, taking the circuit connection mode illustrated in fig. 1 as an example.
The finger fingerprint has valleys and ridges, and when a finger touches the surface of the display panel, the ridges of the fingerprint are in direct contact with the display panel, and air is spaced between the valleys of the fingerprint and the surface of the display panel. When light irradiates the finger, light reflection mainly occurs at the contact position of the ridge of the finger and the display panel, the light quantity of the light reflected by the ridge of the fingerprint is larger, and a photosensitive unit arranged in the display panel can generate a stronger sensing signal after receiving the light reflected by the ridge; the light is mainly refracted at the position where the valley of the finger corresponds to the display panel, the light penetrates through the display panel, is refracted and then irradiates the valley of the fingerprint, and then is reflected by the valley, penetrates through the display panel again and can be received by the photosensitive unit, so that the light loss at the position is large, the light quantity of the light reflected by the valley of the fingerprint is small, and the corresponding photosensitive unit can generate a weak sensing signal after receiving the light reflected by the valley; therefore, the valleys and ridges of the fingerprint can be identified according to the strength of the induction signal. For the photosensitive units without abnormal photosensitive performance, the sizes of sensing signals are different when the photosensitive units receive light with different intensities, and then the valleys and the ridges of the fingerprint can be accurately identified. The display panel provided by the embodiment of the invention can judge whether the photosensitive unit has abnormality when detecting the valleys and ridges of the fingerprint by simulating the detection process of the valleys and ridges of the fingerprint, judge the fingerprint function of the display panel to be abnormal when the abnormality exists, and discard the detected display panel as an abnormal product without flowing into a subsequent working section.
In the fingerprint detection function testing stage: the signal of input to fingerprint test switch unit ZK through fingerprint test control port DK2 to and the signal of fingerprint scan control port group DKZ to fingerprint scan drive circuit ZL1 input mutually support, the control sensitization unit is opened in the line, then each sensitization unit in the sensitization unit line after opening can transmit induction signal to fingerprint test signal output port DK1 through fingerprint data line ZD, through the current value of test fingerprint test signal output port DK1 department, obtain the test current value, then judge whether sensitization unit Y in the sensitization unit line is unusual according to the test current value.
Under the condition that the photosensitive unit has no abnormity, the photosensitive unit can generate a corresponding induction signal after receiving illumination. When the light sensing unit is abnormal, it may generate an abnormal sensing signal after receiving illumination, such as: an excessively small sensing signal is generated after receiving strong light irradiation, or an excessively large sensing signal is generated after receiving weak light irradiation. The above abnormal phenomena all affect the fingerprint recognition function. The embodiment of the invention can evaluate the photosensitive performance of the photosensitive unit by testing the current value, such as: when the photosensitive unit row is controlled to receive strong light irradiation, if the detected test current value is too small, the photosensitive unit row is indicated to have a photosensitive unit which generates an abnormal induction signal after receiving the strong light; when the photosensitive unit row is controlled to receive weak light irradiation, if the detected test current value is too large, the photosensitive unit row is indicated to have a photosensitive unit which generates an abnormal sensing signal after receiving the weak light.
In the first test method, before the fingerprint detection function test, the photosensitive units manufactured by the same process are tested to obtain the sensing condition when a single photosensitive unit receives light irradiation with stronger brightness (first brightness) in the first state and the sensing condition when the single photosensitive unit receives light irradiation with weaker brightness (second brightness) in the second state. Considering the influence of manufacturing process errors and the like, the plurality of photosensitive units can be tested respectively, and then the test results are integrated. Obtaining the range of the current value generated when the photosensitive unit receives the first brightness illumination, and taking the minimum value in the range as the detection threshold A' of the fingerprint ridge detection function. And obtaining the range of the current value generated when the photosensitive unit receives the second brightness illumination, and taking the maximum value in the range as the detection threshold value A' of the fingerprint valley detection function. The first test method will be described with reference to the detection of the first row of photosensitive cell rows YH1 in fig. 1, which includes 4 photosensitive cells Y.
During testing, the photosensitive unit is controlled to be started, and the current value of the output port of the fingerprint test signal is tested to obtain a test current value; and then judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value.
Specifically, in the first state, the light sensing units Y in the first row of light sensing unit rows YH1 are all controlled to receive the illumination with the first brightness. Optionally, the display panel may be provided with a test card on one side of the display surface, and the test card is opposite to the display surface of the display panel during testing. The test surface of the test card is a smooth surface, and when light irradiates the test surface, the intensity of reflected light at each position of the test surface is ensured to be the same as much as possible, so that the photosensitive units Y in the first row of photosensitive unit rows YH1 can all receive the light with the first brightness. And testing the current value at the fingerprint test signal output port DK1 to obtain a first current value 1A, wherein the first test current value 1A is the sum of the signal quantities generated after the 4 photosensitive units Y are photosensitive. The first current value 1A is compared with a first threshold value 1W, where the first threshold value 1W is 4 × a'. When the first current value 1A is greater than or equal to the first threshold value 1W, it is determined that the photosensitive cells Y in the first row of photosensitive cell rows YH1 have no abnormality in detecting the ridge of the fingerprint; when the first current value 1A is smaller than the first threshold value W1, it is determined that the photosensitive cells Y in the first row of photosensitive cell rows YH1 have an abnormality in detecting the ridges of the fingerprint.
Specifically, in the second state, the light sensing units Y in the first row of light sensing unit rows YH1 are all controlled to receive the illumination with the second brightness, the current value at the fingerprint test signal output port DK1 is tested, and a second test current value 2A is obtained, where the second current value 1A is the sum of the signal quantities generated after the light sensing of 4 light sensing units Y. Second current value 2A is compared to second threshold value 2W, where second threshold value 1W is 4a ". When the second current value 2A is less than or equal to the second threshold value 2W, it is determined that the photosensitive cells Y in the first row of photosensitive cell rows YH1 have no abnormality in detecting the valley of the fingerprint; when the second current value 2A is smaller than the second threshold value 2W, it is determined that the photosensitive cells Y in the first row of photosensitive cell rows YH1 have an abnormality when detecting the valley of the fingerprint.
By detecting the first state and the second state, it can be determined whether or not there is an abnormality in the first row photosensitive-unit row YH1 when detecting the valleys of the fingerprint and the ridges of the fingerprint. When there is an abnormality in the detection in either state or in both states, it is determined that there is an abnormality in the photosensitive cells Y in the first row of photosensitive cell rows YH1, and the abnormality affects the use of the fingerprint recognition function.
The test method realizes the test process of one photosensitive unit row. The method is applied to the display panel provided by the embodiment of the invention, the photosensitive unit rows in the photosensitive unit array are controlled to be opened line by line through the fingerprint detection control end, and the test of each photosensitive unit row in the photosensitive unit array can be realized by adopting the test method.
It should be noted that in the embodiment illustrated in fig. 1, in which all the fingerprint data lines ZD are electrically connected to the same fingerprint test signal output terminal DK1, the light sensing performance of one light sensing unit row can be tested by the first test method. In some optional embodiments, the plurality of fingerprint data lines ZD may be grouped, and each group of fingerprint data lines SD corresponds to one fingerprint test signal output end. For different grouping modes, other testing methods may be adopted to detect the fingerprint identification function, which will be described in the following specific embodiments.
The display panel provided by the embodiment of the invention is provided with the fingerprint test circuit, and the line-by-line detection of the photosensitive unit lines can be realized through the mutual matching of the fingerprint test circuit and the fingerprint scanning drive circuit. When a certain photosensitive unit row is detected, the current value at the fingerprint test output port is detected to obtain a test value, the photosensitive performance of the photosensitive element in the photosensitive unit row is evaluated through the test current value, when the photosensitive performance is abnormal, the fingerprint function of the display panel is judged to be abnormal, and the detected display panel is discarded as an abnormal product and does not need to flow into a subsequent working section. Therefore, the fingerprint identification function of the display panel can be detected before the flexible circuit board binding process, and the problem that the abnormal fingerprint identification product flows into a subsequent working section to cause waste is avoided.
In some optional embodiments, the fingerprint test circuit includes two fingerprint test signal output ports, and the two fingerprint test signal output ports include an a fingerprint test signal output port and a b fingerprint test signal output port, where N fingerprint data lines are electrically connected to the a fingerprint test signal output port, N-N fingerprint data lines are electrically connected to the b fingerprint test signal output port, N is a positive integer, and N is greater than or equal to N. In this embodiment, the fingerprint data lines are divided into two groups, where N fingerprint data lines in one group are electrically connected to the first fingerprint test signal output port, and N-N fingerprint data lines in the other group are electrically connected to the second fingerprint test signal output port. Wherein N and N-N may be equal or unequal.
In one embodiment, N-4 and N-2 are illustrated schematically. Fig. 2 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 2, the fingerprint test signal output ports include an first fingerprint test signal output port DK11 and a second fingerprint test signal output port DK12, 2 fingerprint data lines ZD shown in the figure are electrically connected to the first fingerprint test signal output port DK11, and 2 fingerprint data lines ZD are electrically connected to the second fingerprint test signal output port DK 12. The display panel provided by the embodiment can also adopt the first test method to detect the light sensing performance of the light sensing unit. When the first photosensitive unit row YH1 is tested: in the first state, all the photosensitive units Y in the first row of photosensitive unit row YH1 are controlled to receive illumination with the first brightness, the current value at the first fingerprint test signal output port DK11 is tested, a test current value 1a1 (i.e., the first test current value corresponding to the first fingerprint test signal output port DK 11) is obtained, 1a1 is the sum of the signal quantities generated after the 2 photosensitive units Y are subjected to light sensing, and whether the photosensitive unit Y outputting the sensing signal to the first fingerprint test signal output port DK11 has an abnormality when detecting the ridge of the fingerprint is determined by comparing the test current value 1a1 with a threshold value 1W1 (i.e., the first threshold value corresponding to the first fingerprint test signal output port DK 11), which corresponds to the embodiment illustrated in fig. 2, where 1W1 is 2 a'. And testing the current value at the second fingerprint test signal output port DK12 to obtain a test current value 1A2 (namely, a first test current value corresponding to the second fingerprint test signal output port DK 12), wherein 1A2 is the sum of the signal quantities generated after the 2 light sensing units Y sense light. By comparing the test current value 1a2 with the threshold value 1W2 (i.e., the first threshold value corresponding to the second fingerprint test signal output port DK 12), it is determined whether the photoreceptor unit Y outputting the sensing signal to the second fingerprint test signal output port DK12 is abnormal when detecting the ridge of the fingerprint, which corresponds to the embodiment illustrated in fig. 2, where 1W2 is 2 × a'. In the second state, the method for detecting whether there is an abnormality in the photosensitive units Y in the first row of photosensitive unit rows YH1 when detecting the ridge of the fingerprint can be understood with reference to the above-mentioned test method, and will not be described herein again.
In addition, in this embodiment, by grouping the fingerprint data lines, one fingerprint test signal output port is electrically connected to a part of the fingerprint data lines in the display panel, that is, a current value detected at the fingerprint test signal output port is the sum of the sensing signals of a part of the photosensitive cells in one photosensitive cell row. The number of the photosensitive units detected by one fingerprint test signal output port is reduced equivalently, and the accuracy of the fingerprint identification function test can be improved to a certain extent. Taking the detection in the first state as an example, in a certain case, among the plurality of light sensing units corresponding to the same fingerprint test signal output port: the current value generated by the sensing signal of one photosensitive unit is lower than the detection threshold value A '(actually, the current value generated by the sensing signal of the remaining photosensitive units is larger than the detection threshold value A'), so that compensation is caused to a smaller current value, the finally detected first test current value is larger than the first threshold value, and in this case, the abnormal sensing unit in the row of the photosensitive units cannot be identified. In the embodiment of the invention, the number of the photosensitive units detected by one fingerprint test signal output port is reduced, the probability of the above situation can be reduced to a certain extent, and the accuracy of the fingerprint identification function test is improved.
While the embodiment corresponding to fig. 2 illustrates a division of the fingerprint data lines, in another embodiment, the odd-numbered fingerprint data lines may be divided into one group and the even-numbered fingerprint data lines may be divided into one group in the arrangement direction of the fingerprint data lines. Fig. 3 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 3, the N (N ═ 4 in the figure) fingerprint data lines include first fingerprint data line ZD1 and second fingerprint data line ZD2, and first fingerprint data line ZD1 and second fingerprint data line ZD2 are alternately arranged in the first direction x, where N (N ═ 2 in the figure) fingerprint data lines electrically connected to the first fingerprint test signal output port DK11 are all first fingerprint data lines ZD1, and N-N (N-N ═ 2 in the figure) fingerprint data lines electrically connected to the second fingerprint test signal output port DK12 are all second fingerprint data lines 2. This embodiment is equivalent to grouping a plurality of fingerprint data lines in the arrangement direction, taking the first fingerprint data line ZD1 as the odd-numbered fingerprint data line and the second fingerprint data line ZD2 as the even-numbered fingerprint data line as an example.
The display panel provided by this embodiment may adopt the first test method to detect the light sensing performance of the light sensing unit in the light sensing unit. When the first test method is applied to this embodiment, when detecting one line of photosensitive cells, it is necessary to simultaneously detect the current value at the first fingerprint test signal output port DK11 and the current value at the second fingerprint test signal output port DK12, that is, the first current values corresponding to the two ports. Wherein, the current value at first fingerprint test signal output port DK11 is: the induction signals of the photosensitive unit Y electrically connected with the first fingerprint data line ZD1 in the photosensitive unit row are added, and the current value at the second fingerprint test signal output port DK12 is as follows: the sensing signals of the photosensitive cells Y in the photosensitive cell row electrically connected to the second fingerprint data line ZD2 are summed. The corresponding first threshold value of the first fingerprint test signal output port DK11 is the sum of n detection threshold values a' and the corresponding second threshold value is the sum of n detection threshold values a ". The corresponding second fingerprint test signal output port DK12 corresponds to a first threshold that is the sum of N-N detection thresholds a' and a second threshold that is the sum of N-N detection thresholds a ".
The display panel provided by the embodiment can also adopt a second test method to detect the light sensing performance of the light sensing unit in the light sensing unit. In the second testing method, before the fingerprint detection function is tested, the photosensitive units manufactured by the same process also need to be tested, so as to obtain the detection threshold a' for detecting the fingerprint ridge function and the detection threshold a ″ for detecting the fingerprint valley function, where the method for obtaining the detection threshold refers to the description in the first testing method, and is not repeated here. The second test method will be described by testing the first photosensitive cell row YH1, taking N-4 and N-2 as an example, as shown in fig. 3.
In the third state, the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 is controlled to receive the illumination of the third brightness, and the light sensing unit Y electrically connected to the second fingerprint data line ZD2 receives the illumination of the fourth brightness. Wherein the third brightness is greater than the fourth brightness. Optionally, the test method may be implemented by disposing a first test card on one side of the display surface of the display panel, where the test surface of the first test card has a plurality of concave portions and a plurality of convex portions, the concave portions and the convex portions are alternately arranged in the row direction and the column direction, and the test surface of the first test card is opposite to the display surface of the display panel during testing (refer to the test card used in the test method, which may be described in the following fixture for the test card). In the third state, the photosensitive cell Y electrically connected to the first fingerprint data line ZD1 corresponds to the convex portion of the first test card, and the photosensitive cell Y electrically connected to the second fingerprint data line ZD2 corresponds to the concave portion of the first test card.
In the third state, the current value of the first fingerprint test signal output port DK11 is tested to obtain a third test current value 3a1, where the third test current value 3a1 is the sum of the signal amounts generated after the n (2 in fig. 3) photosensitive cells Y electrically connected to the first fingerprint data line ZD1 are photosensitive. Then, third test current value 3a1 is compared with third threshold value 3W, and 3W is equal to n × a' since first fingerprint test signal output port DK11 detects the convex portion of the first test card in this state. When the third threshold test current value 3a1 is greater than or equal to the third threshold value 3W, it is determined that the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 has no abnormality when detecting the ridge of the fingerprint; when the third threshold test current value 3a1 is smaller than the third threshold value 3W, it is determined that the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 is abnormal when detecting the ridge of the fingerprint.
In the third state, the current value of the second fingerprint test signal output port DK12 is tested simultaneously to obtain a third test current value 3a2, where the third test current value 3a2 is the sum of the signal quantities generated after sensing N-N (2 in fig. 3) photosensitive units Y electrically connected to the second fingerprint data line ZD 2. Then, the third trace test current value 3a2 is compared with the fourth threshold value 4W, and since the second fingerprint test signal output port DK12 corresponds to the recess of the first test card in this state, 4W ═ N (a ″). When the third test current value 3a2 is less than or equal to the fourth threshold value 4W, it is determined that the light sensing unit Y electrically connected to the second fingerprint data line ZD2 in the first light sensing unit row YH1 has no abnormality when detecting the valley of the fingerprint; when the third test current value 3a2 is greater than the fourth threshold value 4W, it is determined that the light sensing unit Y electrically connected to the second fingerprint data line ZD2 in the first light sensing unit row YH1 is abnormal when detecting the valley of the fingerprint.
In the fourth state, the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 is controlled to receive illumination of the fourth brightness, and the light sensing unit Y electrically connected to the second fingerprint data line ZD2 receives illumination of the third brightness. Alternatively, the display panel may be provided with a second test card on a side of the display surface, where the test surface of the second test card has a plurality of concave portions and a plurality of convex portions, and the concave portions and the convex portions are alternately arranged in the row direction and the column direction. In the fourth state, the photosensitive cell Y electrically connected to the first fingerprint data line ZD1 corresponds to the concave portion of the second test card, and the photosensitive cell Y electrically connected to the second fingerprint data line ZD2 corresponds to the convex portion of the second test card. That is, for the same photosensitive unit, if it detects the concave portion of the first test card correspondingly in the third state, it detects the convex portion of the second test card correspondingly in the fourth state; if the convex part of the first test card is correspondingly detected in the third state, the concave part of the second test card is correspondingly detected in the fourth state.
In the fourth state, the current value of the first fingerprint test signal output port DK11 is tested to obtain a fourth test current value 4a1, where the fourth test current value 4a1 is the sum of the signal amounts generated by sensing n (2 in fig. 3) light sensing units Y electrically connected to the first fingerprint data line ZD 1. Then, the fourth test current value 4a1 is compared with the fifth threshold value 5W, and since the first fingerprint test signal output port DK11 corresponds to the recess of the second test card in this state, 5W is equal to n × a ". When the fourth test current value 4a1 is less than or equal to the fifth threshold value 5W, it is determined that the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 has no abnormality when detecting the valley of the fingerprint; when the fourth test current value 4a1 is greater than the fifth threshold value 5W, it is determined that the light sensing unit Y electrically connected to the first fingerprint data line ZD1 in the first light sensing unit row YH1 is abnormal when detecting the valley of the fingerprint.
In the fourth state, the current value of the second fingerprint test signal output port DK12 is tested simultaneously to obtain a fourth test current value 4a2, where the fourth test current value 4a2 is the sum of N-N (2 in fig. 3) signals generated after being sensed by the light sensing units Y electrically connected to the second fingerprint data line ZD 2. Then, the magnitude of the fourth test current value 4a2 and the magnitude of the sixth threshold value 6W are compared, and since the second fingerprint test signal output port DK12 corresponds to the detection of the convex portion of the second test card in this state, 6W is (N-N) × a'. When the fourth test current value 4a2 is greater than or equal to the sixth threshold value 6W, it is determined that the light sensing unit Y in the first light sensing unit row YH1, which is electrically connected to the second fingerprint data line ZD2, is not abnormal when detecting the ridge of the fingerprint; when the fourth test current value 4a2 is smaller than the sixth threshold value 6W, it is determined that the light sensing unit Y electrically connected to the second fingerprint data line ZD2 in the first light sensing unit row YH1 is abnormal when detecting the ridge of the fingerprint.
With the second testing method, for a photosensitive cell row, the plurality of photosensitive cells electrically connected to the first fingerprint data line in the photosensitive cell row can detect whether the detected fingerprint ridges are abnormal in the third state, and detect whether the detected fingerprint valleys are abnormal in the fourth state; and a plurality of photosensitive units electrically connected with the second fingerprint data line in the photosensitive units can detect whether the detected fingerprint valley is abnormal or not in the third state and detect whether the detected fingerprint ridge is abnormal or not in the fourth state. So that it can be judged whether the light sensing unit row has abnormality when detecting the valleys of the fingerprint and the ridges of the fingerprint. When the detection in any one state is abnormal or the detection in both states is abnormal, the photosensitive units in the photosensitive unit row are judged to be abnormal, and the abnormal condition can influence the use of the fingerprint identification function.
The test method realizes the test process of one photosensitive unit row. The method is applied to the display panel provided by the embodiment of the invention, the photosensitive unit rows in the photosensitive unit array are controlled to be opened line by line through the fingerprint detection control end, and the test of each photosensitive unit row in the photosensitive unit array can be realized by adopting the test method.
Further, in the embodiment where the odd-numbered fingerprint data lines are divided into one group and the even-numbered fingerprint data lines are divided into one group in the arrangement direction of the fingerprint data lines, the data signal output port of the display test in the display panel may be multiplexed as the fingerprint test signal output port. Fig. 4 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 4, the display panel further includes a display test circuit including a first data signal output port DD1 and a second data signal output port DD 2; the display panel includes a plurality of display data lines extending in the second direction y, the plurality of display data lines including first display data lines XD1 and second display data lines XD2, the first display data lines XD1 and the second display data lines XD2 being alternately arranged in the first direction x, all of the first display data lines XD1 being electrically connected to the first data signal output port DD1, and all of the second display data lines XD2 being electrically connected to the second data signal output port DD 2. In the figure, for the sake of clarity, only a part of the first display data line XD1 and the second display data line XD2, and their connection relationship with the data signal output port, are illustrated. In addition, the display data lines in the display area are represented by thick lines, and the fingerprint data lines are represented by thin lines, which are only used for displaying two types of data lines and do not represent the actual line width relationship of the two types of data lines. In order to realize the display of the display panel, a plurality of display scan lines (not shown) extending along the first direction x are disposed in the actual display panel. In the first direction x in which the display data lines are arranged, when the first display data line XD1 is an odd-numbered display data line, the second display data line XD2 is an even-numbered display data line; when the first display data line XD1 is the even display data line, the second display data line XD2 is the odd display data line.
The display test circuit further comprises a first switch unit XK1, a second switch unit XK2 and a display test control port SW, wherein a first display data line XD1 is electrically connected with the first data signal output port DD1 through the first switch unit XK1, a second display data line XD2 is electrically connected with the second data signal output port DD2 through the second switch unit XK2, and both a control end of the first switch unit XK1 and a control end of the second switch unit XK2 are electrically connected with the display test control port SW; that is, the display test control port SW is used for outputting control signals to the control terminal XK1 of the first switch unit and the control terminal XK2 of the second switch unit so as to realize the opening or closing of the first switch unit XK1 and the second switch unit XK 2. Alternatively, the first switching unit XK1 includes one switching transistor, and the second switching unit XK2 includes one switching transistor. The switching transistor is only illustrated as an N-type transistor, and alternatively, the switching transistor may be a P-type transistor.
The fingerprint test switch unit includes a first fingerprint test switch unit ZK1 and a second fingerprint test switch unit ZK2, a first fingerprint data line ZD1 is electrically connected with a first data signal output port DD1 through the first fingerprint test switch unit ZK1, and a second fingerprint data line ZD2 is electrically connected with a second data signal output port DD2 through the second fingerprint test switch unit ZK 2. Optionally, the first fingerprint test switch unit ZK1 includes a switching transistor, and the second fingerprint test switch unit ZK2 includes a switching transistor. The switching transistor is only illustrated as an N-type transistor, and alternatively, the switching transistor may be a P-type transistor.
In the fingerprint test phase, the first data signal output port DD1 is multiplexed as an a fingerprint test signal output port DK11, and the second data signal output port is multiplexed as an b fingerprint test signal output port DK 12.
In the fingerprint test stage: the first switch unit XK1 and the second switch unit XK2 are both controlled to be in an off state by the display test control port SW input signal. The first fingerprint test switch unit ZK1 and the second fingerprint test switch unit ZK2 are both controlled to be in an open state through a fingerprint test control port DK2 input signal, so that the fingerprint data line is electrically connected with a data signal output port in a display test circuit, and therefore in a fingerprint test stage, the current value of the first data signal output port and the current value of the second data signal output port are respectively detected and used as corresponding test current values. And testing the fingerprint identification function.
Correspondingly, in the display test stage, a signal is input through a fingerprint test control port DK2 to control the first fingerprint test switch unit ZK1 and the second fingerprint test switch unit ZK2 to be in a closed state; the first switch unit XK1 and the second switch unit XK2 are both controlled to be in an open state by the display test control port SW input signal, so that the fingerprint test control port DK2 can input a data signal into a corresponding display data line to realize the test of the display performance.
The display panel provided by this embodiment can test the fingerprint identification function of the display panel before the binding process, and may be tested by the first test method or the second test method, and the specific test process is not described herein again. In addition, the data signal output port used in the display test stage is multiplexed as a fingerprint test signal output port in the fingerprint identification function test, namely, the original port of the fingerprint identification function test multiplexing display panel is not required to be additionally arranged, and the space of a non-display area is saved.
Optionally, as illustrated in fig. 4, the display panel further includes a first control signal line H1, the first control signal line H1 is electrically connected to the display test control port SW, and both the control terminal of the first switch unit XK1 and the control terminal of the second switch unit XK2 are electrically connected to the first control signal line H1, so as to control the first switch unit XK1 and the second switch unit XK2 by the display test control port SW. The number of signal wires arranged in the non-display area can be reduced by the implementation mode, and space saving is facilitated.
Optionally, as illustrated in fig. 4, the display panel further includes a second control signal line H2, the second control signal line H2 is electrically connected to the fingerprint test control port DK2, and both the control end of the first fingerprint test switch unit ZK1 and the control end of the second fingerprint test switch unit ZK2 are electrically connected to the second control signal line H2, so that the control of the first fingerprint test switch unit ZK1 and the second fingerprint test switch unit ZK2 by the fingerprint test control port DK2 is implemented. The number of signal wires arranged in the non-display area can be reduced by the implementation mode, and space saving is facilitated.
In some optional embodiments, the fingerprint test circuit includes a fingerprint test signal output port, and the data signal output port of the display test in the display panel may also be multiplexed as the fingerprint test signal output port. Fig. 5 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 5, the fingerprint test circuit includes a fingerprint test signal output port;
the display panel further comprises a display test circuit comprising a first data signal output port DD1 and a second data signal output port DD 2; the display panel comprises a plurality of display data lines extending along a second direction y, the plurality of display data lines comprise first display data lines XD1 and second display data lines XD2, the first display data lines XD1 and the second display data lines XD2 are alternately arranged in the first direction x, all the first display data lines XD1 are electrically connected with a first data signal output port DD1, and all the second display data lines XD2 are electrically connected with a second data signal output port DD 2; wherein the content of the first and second substances,
the display test circuit further comprises a first switch unit XK1, a second switch unit XK2 and a display test control port SW, wherein a first display data line XD1 is electrically connected with the first data signal output port DD1 through the first switch unit XK1, a second display data line XD2 is electrically connected with the second data signal output port DD2 through the second switch unit XK2, and both a control end of the first switch unit XK1 and a control end of the second switch unit XK2 are electrically connected with the display test control port SW; that is, the display test control port SW is used for outputting control signals to the control terminal XK1 of the first switch unit and the control terminal XK2 of the second switch unit so as to realize the opening or closing of the first switch unit XK1 and the second switch unit XK 2. The fingerprint data line ZD is electrically connected with the first data signal output port DD1 through the fingerprint test switch unit ZK; during the fingerprinting stage, the first data signal output port DD1 is multiplexed into the fingerprinting test signal output port DK 1.
In the fingerprint test stage: the first switch unit XK1 and the second switch unit XK2 are both controlled to be in an off state by the display test control port SW input signal. The fingerprint test switch unit ZK is controlled to be in an open state through an input signal of the fingerprint test control port DK2, so that the electric connection between a fingerprint data line and the first data signal output port DD1 in the display test circuit is realized, and the current value of the first data signal output port DD1 is respectively detected as the corresponding test current value in the fingerprint test stage. And testing the fingerprint identification function.
Correspondingly, in the display test stage, a signal is input through a fingerprint test control port DK2 to control a fingerprint test switch unit ZK to be in a closed state; the first switch unit XK1 and the second switch unit XK2 are both controlled to be in an open state by the display test control port SW input signal, so that the fingerprint test control port DK2 can input a data signal into a corresponding display data line to realize the test of the display performance.
The display panel provided by the embodiment can realize the test of the fingerprint identification function of the display panel before the binding process, and the test can be performed by adopting the first test method, and the specific test process is not repeated herein. In addition, a data signal output port used in the display test stage is multiplexed as a fingerprint test signal output port in the fingerprint identification function test, namely, the original port of the fingerprint identification function test multiplexing display panel is not required to be additionally arranged, and the space of a non-display area is saved.
Further, in the embodiment corresponding to fig. 5, optionally, the first display data line XD1 is an odd-numbered display data line arranged in the first direction x. Alternatively, the first display data line XD1 may be an even-numbered display data line arranged in the first direction x.
In one embodiment, the fingerprint test circuit may include three fingerprint test signal output ports, which is equivalent to dividing the fingerprint data lines in the display area into three groups, and each group of fingerprint data lines corresponds to one fingerprint test signal output port.
In one embodiment, the fingerprint test circuit may include four fingerprint test signal output ports, which is equivalent to dividing the fingerprint data lines in the display area into four groups.
Based on the same inventive concept, the embodiment of the present invention further provides a testing method, which is used for testing the display panel provided by any one of the above embodiments. Fig. 6 is a flowchart of a testing method according to an embodiment of the present invention. As shown in fig. 6, the test method includes:
step S101: and controlling the photosensitive unit to be opened, and testing the current value of the output port of the fingerprint test signal to obtain a test current value. When the fingerprint test device is used for testing, the photosensitive unit is controlled to be opened by matching with a fingerprint test circuit in the display panel, the photosensitive unit is controlled to receive illumination to simulate the process of receiving light reflected by a fingerprint, and the photosensitive unit can generate corresponding sensing signals after receiving the illumination. And one fingerprint test signal output end corresponds to all the fingerprint data lines or part of the fingerprint data lines, so that when one photosensitive unit row is opened, the current value of the fingerprint test signal output end is the sum of the current values generated after all the photosensitive units in the photosensitive unit row are photosensitive, or the sum of the current values generated after part of the photosensitive units in the photosensitive unit row are photosensitive. Therefore, the current value of the output port of the fingerprint test signal is related to the connection relationship between the fingerprint data line and the output port of the fingerprint test signal in the fingerprint test circuit. The process of step S101 is executed, and all the rows of the photosensitive cells in the photosensitive cell array can be sequentially tested to obtain corresponding test current values.
Step S102: and judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value. Under the condition that the photosensitive unit is not abnormal, a corresponding induction signal can be generated after the photosensitive unit receives illumination. When the light sensing unit is abnormal, it may generate an abnormal sensing signal after receiving illumination, such as: an excessively small sensing signal is generated after receiving strong light irradiation, or an excessively large sensing signal is generated after receiving weak light irradiation. The above abnormal phenomena all affect the fingerprint recognition function. The embodiment of the invention can evaluate the photosensitive performance of the photosensitive unit by testing the current value, such as: when the photosensitive unit row is controlled to receive strong light irradiation, if the detected test current value is too small, the photosensitive unit row is indicated to have a photosensitive unit which generates an abnormal induction signal after receiving the strong light; when the photosensitive unit row is controlled to receive weak light irradiation, if the detected test current value is too large, the photosensitive unit row is indicated to have a photosensitive unit which generates an abnormal sensing signal after receiving the weak light.
The embodiment of the invention can judge whether the abnormal induction signal exists in the line of the photosensitive unit or not by testing the current value, and when the abnormal induction signal exists, the abnormal induction unit exists in the photosensitive unit. The photosensitive performance of the in-line photosensitive unit of the photosensitive unit is evaluated by testing the current value, the fingerprint identification function of the display panel can be detected before the binding process of the flexible circuit board, and the problem that the abnormal fingerprint identification function product flows into a subsequent working section to cause waste is avoided. The test method provided by the embodiment of the invention can realize line-by-line detection of the photosensitive units in the photosensitive unit array, does not need to test the photosensitive units one by one, can improve the test efficiency, does not need to add too many ports in the display panel, and is beneficial to saving the space of the display panel.
Further, in some optional embodiments, fig. 7 is a flowchart of an optional embodiment of the testing method according to an embodiment of the present invention. FIG. 8 is a diagram illustrating a state of the display panel when the display panel is tested by the testing method provided in FIG. 7. As shown in fig. 8, in performing the test, the display panel 100 is interposed between the surface light source 200 and the test card 300, wherein the display surface M of the display panel 100 faces away from the surface light source 200, and the display surface M of the display panel 100 faces the test surface 300C of the test card 300. After the surface light source 200 is turned on, the light emitted therefrom penetrates the display panel 100 and then irradiates the test surface 300C of the test card 300, and the light reflected by the test surface 300C is reflected back to the display panel 100 again and received by the light sensing units in the display panel 100. Optionally, the test surface 300C is a smooth surface, and it can be ensured that the intensities of the reflected lights at the positions of the test surface are the same as much as possible when light irradiates the test surface, so that the photosensitive units in the photosensitive unit row can all receive the light with the same brightness. As shown in fig. 7, the test method includes: and respectively testing the current values of the fingerprint test signal output ports in the first state and the second state to evaluate the photosensitive performance of the photosensitive unit in the photosensitive unit. Specifically, the method comprises the following steps:
step S201: in a first state, testing the current value of the fingerprint test signal output port to obtain a first current value; the brightness of the light source 200 in the first state is greater than the brightness of the light source 200 in the second state. That is, in the first state, the light sensing unit receives stronger illumination than in the second state.
Step S202: comparing the first current value with the first threshold value, and judging that the photosensitive units in the photosensitive unit row are not abnormal when detecting the ridge of the fingerprint when the first current value is greater than or equal to the first threshold value; when the first current value is smaller than a first threshold value, judging that the photosensitive units in the photosensitive unit row are abnormal when detecting the ridges of the fingerprint;
step S203: in a second state, testing the current value of the fingerprint test signal output port to obtain a second current value;
step S204: comparing the second current value with a second threshold value, and judging that the photosensitive units in the photosensitive unit row are not abnormal when detecting the valley of the fingerprint when the second current value is less than or equal to the second threshold value; and when the second current value is larger than the second threshold value, judging that the photosensitive units in the photosensitive unit row have abnormity when detecting the valley of the fingerprint.
In the embodiment of the present invention, the detection order of the first state and the second state is not limited. For a specific application process of the test method provided in this embodiment, reference may be made to the description of the first test method in the foregoing embodiment of the display panel, and details are not repeated here.
According to the test method provided by the embodiment, when a certain photosensitive unit is detected, the detection process of the photosensitive unit on the valley or ridge of the fingerprint is simulated by respectively detecting the current values at the fingerprint test output port in two different states. Therefore, whether the photosensitive unit is abnormal or not when detecting the valleys and ridges of the fingerprint is judged, the fingerprint function of the display panel is judged to be abnormal when the fingerprint is abnormal, and the detected display panel is discarded as an abnormal product and does not need to flow into a subsequent working section. Therefore, the fingerprint identification function of the display panel can be detected before the flexible circuit board binding process, and the problem that the abnormal fingerprint identification product flows into a subsequent working section to cause waste is avoided.
An embodiment of the present invention further provides a method for testing a display panel, which can test the display panel in the embodiments of fig. 3 and 4, and fig. 9 is a flowchart of another alternative implementation of the testing method provided in the embodiment of the present invention, as shown in fig. 9, the testing method includes: controlling the photosensitive unit to be opened, and testing the current value of the output port of the fingerprint test signal to obtain a test current value; and judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value.
The test principle of the test method provided by the embodiment is that the corresponding induction signal can be generated after the light irradiation is received as the detection standard under the condition that the photosensitive unit has no abnormality. When the light sensing unit is abnormal, it may generate an abnormal sensing signal after receiving illumination, such as: an excessively small sensing signal is generated after receiving strong light irradiation, or an excessively large sensing signal is generated after receiving weak light irradiation. The above abnormal phenomena all affect the fingerprint recognition function. The light sensing performance of the light sensing unit is evaluated by testing current values, such as: when the photosensitive unit is controlled to receive strong light irradiation, if the detected test current value is too small, the photosensitive unit to be detected has a photosensitive unit which generates an abnormal induction signal after receiving the strong light; when the photosensitive units are controlled to receive weak light irradiation, if the detected test current value is too large, the photosensitive units to be detected have photosensitive units which generate abnormal sensing signals after receiving the weak light. The test method specifically comprises the following steps:
and respectively testing the current values of the fingerprint test signal output ports in the third state and the fourth state to evaluate the light sensing performance of the light sensing unit. FIG. 10 is a first diagram illustrating a state of the display panel when the display panel is tested by the testing method provided in FIG. 9. FIG. 11 is a second schematic view illustrating a state of the display panel during testing by using the testing method provided in FIG. 9. Fig. 12 is a schematic view of a test surface of a test card used in the test method according to the embodiment of the present invention. Fig. 13 is a schematic sectional view taken along line F-F' of fig. 12.
As illustrated in fig. 10, the third state is a state in which the display surface M of the display panel 100 and the test surface a300C of the first test card a300 are opposed to each other. As shown in fig. 11, the fourth state is a state in which the display surface M of the display panel 100 and the test surface B300C of the second test card B300 are opposed to each other. Wherein the test surface a300C of the first test card a300 and the test surface B300C of the second test card B300 each have a plurality of concave portions and a plurality of convex portions. It should be noted that fig. 10 and 11 are only schematic diagrams of relative positions, and actually, during testing, the test surface of the test card is opposite to the display surface of the display panel, and the convex portion on the test surface is in contact with the display panel. The light emitted from the surface light source 200 is transmitted through the display panel and then irradiated onto the test surface of the test card, the reflection degrees on the convex portion and the concave portion of the test surface are different, and the reflected light is re-emitted to the display panel and then received by the light sensing unit.
The test faces of the first test card and the second test card can both refer to the schematic of fig. 12 and 13. As shown in fig. 12, the concave portions O and the convex portions T are alternately arranged in both the row direction and the column direction. In fig. 13, the concave portion O and the convex portion T are schematically shown, and the shapes of the concave portion O and the convex portion T are not limited in the present invention. Optionally, the first test card and the second test card may also be the same test card, and two surfaces of the test card are respectively a test panel of the first test card and a test surface of the second test card. For the same photosensitive unit, the concave part of the first test card is correspondingly detected in the third state, and the convex part of the second test card is correspondingly detected in the fourth state; if the convex part of the first test card is correspondingly detected in the third state, the concave part of the second test card is correspondingly detected in the fourth state. In the third state, the photosensitive unit electrically connected to the first fingerprint data line detects the convex portion of the first test card, and the photosensitive unit electrically connected to the second fingerprint data line detects the concave portion of the first test card.
Step S301: in a third state, testing the current value of the first fingerprint test signal output port to obtain a third test current value, and testing the current value of the second fingerprint test signal output port to obtain a third test current value; the third test current value corresponds to the sum of the sensing signals generated after the plurality of photosensitive units receive the reflected light beams of the convex parts of the first test card, and the third test current value corresponds to the sum of the sensing signals generated after the plurality of photosensitive units receive the reflected light beams of the concave parts of the first test card.
Step S302: comparing the third testing current value with a third threshold value, judging the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row when the third testing current value is larger than or equal to the third threshold value, and detecting the ridge of the fingerprint without abnormity; when the third testing current value is smaller than a third threshold value, judging that the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row are abnormal when detecting the ridge of the fingerprint;
step S303: comparing the magnitude of the third testing current value with the magnitude of the fourth threshold value, and judging the photosensitive unit electrically connected with the second fingerprint data line in the photosensitive unit row when the third testing current value is less than or equal to the fourth threshold value, wherein no abnormality exists when the valley of the fingerprint is detected; when the third test current value is larger than the fourth threshold value, judging that the photosensitive unit electrically connected with the second fingerprint data line in the photosensitive unit row is abnormal when detecting the valley of the fingerprint;
step S304: in the fourth state, testing the current value of the first fingerprint test signal output port to obtain a fourth test current value, and testing the current value of the second fingerprint test signal output port to obtain a fourth test current value; the fourth test current value corresponds to the sum of the sensing signals generated after the plurality of photosensitive cells receive the reflected light beams of the concave part of the second test card, and the fourth test current value corresponds to the sum of the sensing signals generated after the plurality of photosensitive cells receive the reflected light beams of the convex part of the second test card.
Step S305: comparing the magnitude of the fourth testing current value with the magnitude of the fifth threshold value, judging the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row when the fourth testing current value is less than or equal to the fifth threshold value, and detecting the valley of the fingerprint without abnormity; when the fourth test current value is larger than a fifth threshold value, judging the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row, and detecting the valleys of the fingerprints to be abnormal;
step S306: comparing the fourth test current value with a sixth threshold value, and judging the photosensitive units electrically connected with the second fingerprint data line in the photosensitive unit rows when the fourth test current value is greater than or equal to the sixth threshold value, wherein no abnormality exists when detecting the ridges of the fingerprints; and when the fourth test current value is smaller than a sixth threshold value, judging that the photosensitive units electrically connected with the second fingerprint data line in the photosensitive unit row are abnormal when detecting the ridges of the fingerprints.
The testing method provided by this embodiment is applied to a display panel whose fingerprint data lines include first fingerprint data lines and second fingerprint data lines that are alternately arranged, and for the application of the testing method, reference may be made to the description of the second testing method in the embodiment of fig. 3, which is not described herein again. For one photosensitive unit row, a plurality of photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row can detect whether the detected fingerprint ridges are abnormal or not in the third state, and detect whether the detected fingerprint valleys are abnormal or not in the fourth state; and a plurality of photosensitive units electrically connected with the second fingerprint data line in the photosensitive units can detect whether the detected fingerprint valley is abnormal or not in the third state and detect whether the detected fingerprint ridge is abnormal or not in the fourth state. So that it can be judged whether the light sensing unit row has abnormality when detecting the valleys of the fingerprint and the ridges of the fingerprint. When the detection in any one state is abnormal or the detection in both states is abnormal, the photosensitive units in the photosensitive unit row are judged to be abnormal, and the abnormal condition can influence the use of the fingerprint identification function.
Based on the same inventive concept, an embodiment of the present invention further provides a fixture, and fig. 14 is a schematic diagram of the fixture provided in the embodiment of the present invention. As shown in fig. 14, includes: the device comprises a panel bearing table 400, a surface light source 200, a test card 300, a current statistics module 500, a plurality of ports and a test control module 600; wherein the content of the first and second substances,
a panel loading platform 400 for placing a display panel to be tested;
the test card 300 is used for simulating the reflection effect of fingers on light, wherein during testing, the display panel to be tested is positioned between the surface light source 200 and the test card 300, and the display surface of the display panel to be tested deviates from the surface light source 200 and is opposite to the test surface 300C of the test card 300;
the system comprises a plurality of ports, a plurality of test signal receiving ports and a plurality of fingerprint scanning control signal output ports, wherein the plurality of ports are used for being electrically connected with a display panel to be tested, and comprise a fingerprint test signal receiving port W1, a fingerprint test control signal output port W2 and a fingerprint scanning control signal output port group WZ; when the jig is used for testing the display panel, the fingerprint test signal output port on the display panel is correspondingly connected with the fingerprint test signal receiving port W1, the fingerprint test control port is correspondingly connected with the fingerprint test control signal output port W2, and the fingerprint scanning control port group is correspondingly connected with the fingerprint scanning control signal output port group WZ.
The test control module 600 is electrically connected with the fingerprint test control signal output port W2 and the fingerprint scanning control signal output port group WZ respectively, and is used for controlling the photosensitive unit row in the display panel to be tested to be opened; optionally, an editable program is stored in the test control module 600, and when the jig is used, corresponding signals are respectively provided to the fingerprint test control signal output port W2 and the fingerprint scanning control signal output port group WZ through program control.
The current statistics module 500 is electrically connected to the fingerprint test signal receiving port W1, and the current statistics module 500 is configured to receive a current value received by the fingerprint test signal receiving port W1, so as to obtain a test current value. When the jig is used for testing the display panel, the current at the fingerprint test signal output port on the display panel flows to the fingerprint test signal receiving port W1, and the test current value is obtained by testing the fingerprint test signal receiving port W1. Optionally, the current statistics module 500 comprises a current meter.
The jig provided by the embodiment of the invention can realize any one of the testing methods in the embodiments through the mutual matching of all parts in the jig during testing, and is used for testing the fingerprint identification function of the display panel.
Further, the jig provided by the embodiment of the invention further comprises a processing module; and the processing module is electrically connected with the current statistics module 500, and is configured to receive the test current value sent by the ammeter module, and determine whether the photosensitive units in the photosensitive unit row are abnormal according to the test current value. The processing module compares the test current value with a corresponding threshold value to judge the light sensing performance of the light sensing unit. Actually, the connection modes of the fingerprint data lines and the fingerprint test signal output ports in the corresponding display panel are different, the specific test methods adopted during the test are different (aiming at the first test method and the second test method received in the embodiment of the display panel), and the threshold values for comparing with the test current values are also different. For a specific threshold setting principle, reference may be made to the description of the first testing method and the description of the second testing method in the above embodiments, which are not repeated herein
Further, in the jig provided by the embodiment of the present invention, the test surface has a plurality of concave portions and a plurality of convex portions, and the concave portions and the convex portions are alternately arranged in the row direction and the column direction. The illustration and description of the test surface can refer to the corresponding description of fig. 12 and fig. 13, and are not repeated herein. In one embodiment, the diameter of the protrusions is greater than 40um, and the diameter of the recesses and protrusions are about the same. The spacing distance between the concave and convex portions is 10 um.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, and fig. 15 is a schematic view of the display device provided in the embodiment of the present invention. As shown in fig. 15, the display device includes a display panel 100 provided in any embodiment of the present invention. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 15 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (13)

1. A display panel, comprising a display region and a non-display region; the display area comprises a photosensitive unit array, a plurality of photosensitive units are arranged in the photosensitive unit array in an array mode, the photosensitive unit array comprises a plurality of photosensitive unit rows extending along a first direction and a plurality of photosensitive unit columns extending along a second direction, and the first direction is crossed with the second direction;
the display area further includes: m fingerprint scanning lines extending along the first direction, one photosensitive cell row electrically connected to one fingerprint scanning line, N fingerprint data lines extending along the second direction, and one photosensitive cell column electrically connected to one fingerprint data line, wherein N, M are positive integers;
the non-display area includes: a fingerprint scanning drive circuit and a fingerprint test circuit; the fingerprint scanning line is electrically connected with the fingerprint scanning driving circuit;
the fingerprint test circuit comprises at least one fingerprint test signal output port, a fingerprint test control port, a fingerprint scanning control port group and a plurality of fingerprint test switch units, wherein the fingerprint data line is electrically connected with the fingerprint test signal output port through the fingerprint test switch unit, one fingerprint data line corresponds to one fingerprint test switch unit, one fingerprint test signal output port corresponds to at least one fingerprint data line, the control end of the fingerprint test switch unit is electrically connected with the fingerprint test control port, and the fingerprint scanning drive circuit is electrically connected with the fingerprint scanning control port group;
fingerprint test circuit for at fingerprint detection function test stage, pass through fingerprint test control port to fingerprint test switch unit incoming signal, and pass through fingerprint scanning control port group to fingerprint scanning drive circuit incoming signal, to the signal of fingerprint test switch unit input and to the signal of fingerprint scanning drive circuit input mutually supports, in order to control sensitization unit line is opened, after opening each in the sensitization unit line sensitization unit passes through the sensing signal the fingerprint data line transmits for fingerprint test signal output port, through the test fingerprint test signal output port's current value obtains the test current value, then according to the test current value is judged in the sensitization unit line whether the sensitization unit is unusual.
2. The display panel according to claim 1,
the fingerprint test circuit comprises two fingerprint test signal output ports, the two fingerprint test signal output ports comprise an A fingerprint test signal output port and a B fingerprint test signal output port, N fingerprint data lines are electrically connected with the A fingerprint test signal output port, N-N fingerprint data lines are electrically connected with the B fingerprint test signal output port, N is a positive integer, and N is more than or equal to N.
3. The display panel according to claim 2,
the N fingerprint data lines include first fingerprint data lines and second fingerprint data lines, the first fingerprint data lines and the second fingerprint data lines are alternately arranged in the first direction, wherein,
the N fingerprint data lines electrically connected with the first fingerprint test signal output port are the first fingerprint data lines, and the N-N fingerprint data lines electrically connected with the second fingerprint test signal output port are the second fingerprint data lines.
4. The display panel according to claim 3,
the display panel further comprises a display test circuit, wherein the display test circuit comprises a first data signal output port and a second data signal output port; the display panel comprises a plurality of display data lines extending along the second direction, the plurality of display data lines comprise first display data lines and second display data lines, the first display data lines and the second display data lines are alternately arranged in the first direction, all the first display data lines are electrically connected with the first data signal output port, and all the second display data lines are electrically connected with the second data signal output port;
the display test circuit further comprises a first switch unit, a second switch unit and a display test control port, the first display data line is electrically connected with the first data signal output port through the first switch unit, the second display data line is electrically connected with the second data signal output port through the second switch unit, and a control end of the first switch unit and a control end of the second switch unit are both electrically connected with the display test control port; wherein the content of the first and second substances,
the fingerprint test switch unit comprises a first fingerprint test switch unit and a second fingerprint test switch unit, the first fingerprint data line is electrically connected with the first data signal output port through the first fingerprint test switch unit, and the second fingerprint data line is electrically connected with the second data signal output port through the second fingerprint test switch unit;
in a fingerprint test stage, the first data signal output port is multiplexed as the first fingerprint test signal output port, and the second data signal output port is multiplexed as the second fingerprint test signal output port.
5. The display panel according to claim 1,
the fingerprint test circuit comprises a fingerprint test signal output port;
the display panel further comprises a display test circuit, wherein the display test circuit comprises a first data signal output port and a second data signal output port; the display panel comprises a plurality of display data lines extending along the second direction, the plurality of display data lines comprise first display data lines and second display data lines, the first display data lines and the second display data lines are alternately arranged in the first direction, all the first display data lines are electrically connected with the first data signal output port, and all the second display data lines are electrically connected with the second data signal output port; wherein the content of the first and second substances,
the display test circuit further comprises a first switch unit and a display test control port, the first display data line is electrically connected with the first data signal output port through the first switch unit, and the control end of the first switch unit is electrically connected with the display test control port;
the fingerprint data line is electrically connected with the first data signal output port through the fingerprint test switch unit;
in a fingerprint test phase, the first data signal output port is multiplexed as the fingerprint test signal output port.
6. The display panel according to claim 5,
the first display data line is an odd number of the display data lines arranged in the first direction, or the first display data line is an even number of the display data lines arranged in the first direction.
7. A method for testing a display panel, which is used for testing the display panel according to any one of claims 1 to 6, wherein the method comprises:
controlling the photosensitive unit to be opened, and testing the current value of the output port of the fingerprint test signal to obtain a test current value;
and judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value.
8. The testing method of claim 7, further comprising:
placing the display panel between a surface light source and a test card, wherein the display surface of the display panel is opposite to the surface light source and the display surface of the display panel is opposite to the test surface of the test card;
testing the current value of the fingerprint test signal output port to obtain a test current value, comprising:
in a first state, testing the current value of the fingerprint test signal output port to obtain a first current value;
in a second state, testing the current value of the fingerprint test signal output port to obtain a second current value; wherein the luminance of the surface light source in the first state is greater than the luminance of the surface light source in the second state;
judging whether the photosensitive units in the photosensitive unit row are abnormal according to the test current value comprises the following steps:
comparing the first current value with a first threshold value, and judging that the photosensitive units in the photosensitive unit row are not abnormal when detecting the ridges of the fingerprint when the first current value is greater than or equal to the first threshold value; when the first current value is smaller than the first threshold value, judging that the photosensitive units in the photosensitive unit row are abnormal when detecting ridges of fingerprints;
comparing the second current value with a second threshold value, and judging that the photosensitive units in the photosensitive unit row are not abnormal when detecting the valley of the fingerprint when the second current value is less than or equal to the second threshold value; and when the second current value is larger than the second threshold value, judging that the photosensitive units in the photosensitive unit row are abnormal when detecting the valley of the fingerprint.
9. A test method of a display panel for testing the display panel according to claim 3 or 4, the test method comprising:
controlling the photosensitive unit to open, testing the current value of the fingerprint test signal output port to obtain a test current value, and the method comprises the following steps:
in a third state, testing the current value of the first fingerprint test signal output port to obtain a third test current value, and testing the current value of the second fingerprint test signal output port to obtain a third test current value;
in a fourth state, testing the current value of the first fingerprint test signal output port to obtain a fourth test current value, and testing the current value of the second fingerprint test signal output port to obtain a fourth test current value; in the third state, the display surface of the display panel is opposite to the test surface of the first test card, in the fourth state, the display surface of the display panel is opposite to the test surface of the second test card, the test surface of the first test card and the test surface of the second test card are respectively provided with a plurality of concave parts and a plurality of convex parts, the concave parts and the convex parts are alternately arranged in the row direction and the column direction, and the same photosensitive unit correspondingly detects the concave parts of the first test card in the third state and correspondingly detects the convex parts of the second test card in the fourth state;
judging whether the photosensitive units in the photosensitive unit row are abnormal according to the test current value comprises the following steps:
comparing the third testing current value with a third threshold value, and judging the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row when the third testing current value is greater than or equal to the third threshold value, wherein no abnormity exists when the ridge of the fingerprint is detected; when the third testing current value is smaller than the third threshold value, judging that the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row are abnormal when detecting the ridge of the fingerprint;
comparing the magnitude of the third testing current value with the magnitude of a fourth threshold value, and judging that the photosensitive units electrically connected with the second fingerprint data line in the photosensitive unit row are abnormal when detecting the valley of the fingerprint when the third testing current value is less than or equal to the fourth threshold value; when the third testing current value is larger than the fourth threshold value, judging that the photosensitive unit electrically connected with the second fingerprint data line in the photosensitive unit row is abnormal when detecting the valley of the fingerprint;
comparing the fourth test current value with a fifth threshold value, and judging that the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row are not abnormal when detecting the valley of the fingerprint when the fourth test current value is less than or equal to the fifth threshold value; when the fourth test current value is larger than the fifth threshold value, judging that the photosensitive units electrically connected with the first fingerprint data line in the photosensitive unit row are abnormal when detecting the valley of the fingerprint;
comparing the fourth test current value with a sixth threshold value, and when the fourth test current value is greater than or equal to the sixth threshold value, judging that the photosensitive units electrically connected with the second fingerprint data line in the photosensitive unit row have no abnormality when detecting the ridge of the fingerprint; and when the fourth test current value is smaller than the sixth threshold value, judging that the photosensitive units electrically connected with the second fingerprint data line in the photosensitive unit row are abnormal when detecting the ridge of the fingerprint.
10. A jig for implementing the method for testing a display panel according to any one of claims 7 to 9, comprising: the device comprises a panel bearing table, a surface light source, a test card, a current statistical module, a plurality of ports and a test control module; wherein the content of the first and second substances,
the panel bearing table is used for placing a display panel to be tested;
the test card is used for simulating the reflection effect of fingers on light, wherein during testing, the display panel to be tested is positioned between the surface light source and the test card, and the display surface of the display panel to be tested deviates from the surface light source and is opposite to the test surface of the test card;
the ports are used for being electrically connected with the display panel to be tested, and comprise a fingerprint test signal receiving port, a fingerprint test control signal output port and a fingerprint scanning control signal output port group;
the test control module is electrically connected with the fingerprint test control signal output port and the fingerprint scanning control signal output port respectively, and is used for controlling the photosensitive unit row in the display panel to be tested to be opened;
the current counting module is electrically connected with the fingerprint test signal receiving port and used for receiving a current value received by the fingerprint test signal receiving port to obtain a test current value.
11. The fixture of claim 10, further comprising a processing module;
the processing module is electrically connected with the current counting module and used for receiving the test current value sent by the current counting module and judging whether the photosensitive units in the photosensitive unit row are abnormal or not according to the test current value.
12. The fixture according to claim 10,
the test surface has a plurality of concave portions and a plurality of convex portions, the concave portions and the convex portions being alternately arranged in both the row direction and the column direction.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
CN201911043777.5A 2019-10-30 2019-10-30 Display panel, test method and tool thereof and display device Active CN110715792B (en)

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